New plane has a dual 430W setup with the MX20. Previous owner only purchased East Coast charts and I live on the West Coast. I have no airport information once I crossed New Mexico. Do I buy the Jeppensen or Garmin? Or do I need to buy both? From my Garmin account they are suggesting: United States Standard OnePak View Coverage Details Includes Navigation Data, Terrain, Obstacle Covers: GNS 430W, GNS 430W Or do I want the option with FlightCharts? Do I then need to buy the Jeppensen Charts as well? Or do I just need to do the Garmin One Time Update on the 430Ws? I also need to buy the GMX200 database subscription? It says 'The FliteCharts database contains digital depictions of terminal procedure charts, including departure, arrival, and approach procedures. For certified devices, FliteCharts will no longer function 180 days after the expiration date.' so if I do the one time update it won;t work after 180 days? At almost $2,000 a year it seems like there has to be an either or optiop, why do I need both?